Definition of cube noun from the Oxford Advanced Learner's Dictionary

cube

noun
kjuːb
 
; kjuːb
 
 
1 a solid or hollow figure with six equal square sides2 a piece of something, especially food, with six sidesCut the meat into cubes. see also ice cube, stock cube, sugar cube3 (mathematics) the number that you get when you multiply a number by itself twiceThe cube of 5 (5 3) is 125 (5×5×5).